CVE-2025-12603 /etc/timezone can be Arbitrarily Written
An attacker can arbitrarily write to the /etc/timezone file on BLU-IC2 and BLU-IC4 industrial controllers, potentially altering system configuration.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-12603?
CVE-2025-12603 is a low-severity path traversal vulnerability in Azure Access Technology BLU-IC2, published on 1 Nov 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
/etc/timezone can be Arbitrarily Written.This issue affects BLU-IC2: through 1.19.5; BLU-IC4: through 1.19.5.
Weakness: CWE-787
Which versions are affected by CVE-2025-12603?
It affects 2 products.
Products include Azure-Access Blu-Ic2 Firmware, Azure-Access Blu-Ic4 Firmware.
How do I fix CVE-2025-12603?
No fix has been published for CVE-2025-12603 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2025-12603 being exploited?
There is no known exploitation of CVE-2025-12603 in the wild and no public exploit code.
Other vulnerabilities in Azure Access Technology BLU-IC2
Sources
Also known as GHSA-g3pw-38gc-mxqq.